Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1990LASER RS, 2.0 R, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSIDLE CONTROL SYSTEMIDLE SPEED CONTROL SERVO (1.8L)
1990 Plymouth Laser RS, 2.0 R, Standard
Idle Speed Control Servo (1.8L)
1990 Plymouth Laser RS, 2.0 R, StandardSECTION Idle Speed Control Servo (1.8L)
- Idle speed control servo is located on throttle body. Disconnect idle speed control servo connector. Check continuity of idle speed control servo coil.
- Using an ohmmeter, check resistance between idle speed control servo terminals No. 1 and 2. See Figure . Ohmmeter should read 5-35 ohms at 68°F (20°C). Connect a 6-volt power source across idle speed control servo connector terminals No. 1 and 2. Idle speed control servo should operate.
- Replace idle speed control servo if it does not test as described.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.